Calculating machine



Feb. 12 Y1924.

A. F. POOLE CALCULATING MACHINE 1921 3 Sheets-Sheet l Filed July 6 WITNEEEEE.

V A. F. POOLE @ALQULATING MACHINE s sheets-sheet 2 Filed'July '6. 1921 HE ATTRNEY Feb. 12 1924. 1,483,553

A. F. POOLE u CALCULATING MACHINE Filed Juy 6, 1921 4C5 Sheets-Sheet 5 WITNEEEEE l 11m/ENTER HIE ATTRNEY Patented Feb. 12, 1924.

UNITEDl STATES 1,483,553 PATENT OFFICE.

ARTHUR F. POOLE. OF KENILWORTH, ILLINOIS, ASSIGNOR 'IO REMINGTON ACCOUNT- ING MACHINE CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF NEVI YORK.

CALCULATIG MACHINE.

Application filed July G,

To all cti/10m t maf'l/ concern.'

Be it known that I. An'rnun F. Poom, *citizen* of the United States. and resident of Kenilworth. in the county of C'ook and State of Illinois7 have invented certain new and useful. Improvements in Calculating Machines'. of which the following is a specification. f My invention relates to calculating machines and especially to combined typewriting and calculating machines..

My invention has for its principal object to provide certain improvements in `clearance proof mechanism for the totalizers of calculating machines. One of the objects of 'the invention is to provide means for proving the condition of the totalizer as to clear or not clear before writing `the first number of a calculation as well as after t ie copying of the tota-l. Another object of the invention isto provide certain detail improvements.

To the above and other ends which Will hereinafter appear, the invention 'consists 25 in certain features of construction and combinations and arrangements of parts, all of which vwill be fully Set forth herein and particularly pointed out in the claims.

One embodiment of my invention is illustrated in the accompanying drawings, in

which- Figure 1 is a front to rear vertical cross w sectional view of part of a Remington-Tabl combined typewritingr and calculating machine', somefof the mechanism being shown more or less diagram-matically, and the totalizer being shown in section just inside the y right-hand frame plate thereof.

1 but with a number of parts omitted for the sake of clearness of illustration.

Figure 3 is a similar View but with somev parts broken away and with the mechanism in locked position. y Figure 4 is a rear elevation of the totalizer with much of the mechanism removed.

Figure 5 is a vertical'section about on the line 5 5 of Fig. 2 and looking toward the front of the machine.

Figure 6 is a partial plan view in about on the line 6 6 of Fig. 5. Figure 7 is a conventional illustration of one of the type bars and type blocks of 'the machine. I

The Remington-Wahl accounting machine no section `August 3, 1915.

Figure 2 is a view similarfto parts of Fig.

1921. Serial No. 482,787.

l the art and I have there fore shown only so much of'itin the drawings as is necessary to illustrate the application of my invention there-to. One forni of that machine is well shown and described in the patent to Wahl, No. 1.270.471. dated June 25, 1918. Reference may also be had 'to the patent to Vahl, No. 1,148,733 dated It will of course be understood that my invention may be applied or adapted to various styles of calculating machines and' combined typewriting and calculating machines.

The Remington typewriter includes character keys 10 connected to type bars 11, Fig. 7. each carrying` two type and the upper case type can vbe printed by depressing a shift key 12. The Wahl adding mechanism has a stationary frame 13 suitably attached to the typewriter frame, and a truck 14 mounted on three wheels, of which the upper one 15 is shown. Said truck is connected to travel with the. typewriter carriage by means of brackets 16 and screws 17. One or more totalizers 18 are mounted on the truck and secured in place by hooks 20 controlled by a spring 21 and a handle 22. One of the hooks 20 has a tooth 23 that latches into a rack bar 24.011 the front of the truck. `Each of the numeral keys of the typewriter is conis well known in nected by a link 25 with a fan"26 pivotedon a stationary rod 27 in the actuator of the calculating mechanism. Each of these fans has lost motion connection with a goose-neck cam 28, which is adapted to engage a. roller 30, said rollers being mounted in a-series of spirally arranged arms 31 rigid-on a differential rock shaft 32; but the zero key,` which is the one shown in Fig. 1, is connected only, with a tan 26 and does not operate a goose-v neck cam nor the shaft 32. Rigidly mount ed on theV shaft 32 is a block 33 to which is connected'a gear segment 34 so that said segment rocks with the shaft 32 but can be swung laterally into and out of mesh with a main driving pinion 35 in case'the machine is set for addition, or with an auxiliary drivin pinion 36 in case the machine is set for su'traetion. The pinion 35 is splined on a shaft 37 which carries also the master wheel -38 which is adapted to mesh with the carrying wheels 40 of the totalizer, one at a time. The calculating mechanism is provided with a universal bar 41 mounted on arms 42 projecting from a universal rock lit) shaft 43 pivoted in the stationary framework of the actuator. Each of the key operated fans 26 has a projection 44 which when the key is depressed is adapted to swing the universal bar 4l toward the front of the machine. At the end of the down stroke of the key said bar falls off of the rear end of the lugv 44 an'd returns automatically to its normal position shown infFig. l. On the up strokel of the key said universal bar is swung backward and` upward until at the end of said up stroke it again falls off of the projection 44 and returns to its normal position.

The full'strokemechanism of the machine comprises a series of teeth 45 on each of the fans 2G and a lone' pawl 4G adapted to engage said teeth on the down stroke of the key. Said pawl 46 is pivoted at 47 and it has an arm 48 which overlies the right-hand end one of the arms 42 which support the universal bar. Each of said fans also has another set of teeth 50 adapted to he engaged by a second pawl 51 on the up stroke of the key. Said pawl is also pivoted in the stationary framework and it has an arm 52 lying in front of the right-hand arm 42. The construction is such that during the down stroke of the key, when the universal bar is swung,- forward. the arm 42 swings the arm 52 forward and holds the pawl 51 out of engagement with the teeth 50. but duriner this stroke the pawl 46 engages the teeth 4o. YVhen at the beginning`- of the up stroke the universal. bar is swungA backward it acts on the arm 48 and lifts the pawl 46 out of the teeth 45,thus permitting the up stroke of the key to continue. but duringr said up stroke the pawl 51 engages the teeth 50.

The lmaster dog 53 havingr thereon thc lockingy tooth 54, is mounted on a rock shaft 55 and it has a depending arm on which is a roller 56 that runs in a c'a'in groove in an arm 57 on a rock shaft 58 in the stationaryv actuator. The cam arm or plate 57 has a pin 60 that engages in an elongated slot Gl in the end of a link 62, the other end of which is pivoted to an arm G3 projecting' from the universal rock shaft 43. The construction is such that when said universal rock shaft is operated on the down stroke of `a key the link 62 is pushed upward rocking the plate 57 and swinging the master dogr toward the front' of the machine a-nd the locking tooth 54 upward as shown in Fig. E Said locking tooth then engages a rack G4 mounted on the lower part of the truck 14, so that during: the time whenthe universal bar is swung toward the front and the master do;r 53 is swung' forward the truck is positively locked to the stationary actuator and the carriage cannot travel. The machine also contains a single key mechanism (not shown) so that, v'lien any one of the numeral l-:cys is depressed no other` can be depressed. The construction of the parts is also such that if the dog be. rocked to its positon'shtnvn in Fig. 3 and held there. then the universal bar 4lcannot return to its normal position and the full stroke pawl 4G will therefore continue in engagement with the teeth 45 and prevent the depressed key from rising. lYhen the master dog is held in its operated position therefore the carriage is locked against travel, the depressed key is prevented from rising. and all other numeral keys are prevented from being' depressed. and in short the machine is locked up. l utilize this fact in connection with my clearance proof mechanism.

The register wheels of the lVahl totalizer include the carrying wheels 40. which are mounted ona shaft or rod. and said wheels mesh with idle pinions 66 mounted on a transverse shaft 67, and said pinions mesh with the pinionsI GS of the number wheels 70. The carrying or transferriim is effected by means are-.mounted on levers 72 which are pivoted on two rods 73 and 74 and which project downward. being notched at their lower ends. computing zone these levers 72 come one after another into engagement with the master dog' 53, and when said dog is operated it rocks one of the levers and'lifts the Geneva wheel 7l out of engagement with the carryH ing wheel 40 that is then in engagement with the master wheel 38. These levers are returned to normal position by springs 75. The right-hand one of the levers 72 has no Geneva wheel on it but it does have cured thereto a nose or locking tooth 7G which is adapted to lockthe wheel of lowest order. which wheel l have hereinafter. for convenience. called the units wheel.

All of the levers 72 extend to the upper and forward part of the totalizcr where their ends normally rest against adjustingY screws 77 which are secured through a supporting bar 78. Saidlevers are adapted to act on a universal bar 8O which is pivotcd on trunnions Sl in the side plates ol the totalizer. `his universal bar is in the form of a flanged or angled strip of metal. onc flange of which overlies the ends of the levers 72 and the other of which extends downward and forward and has a concritric surface 82. The ends ot' the levers 72 are so shaped that when any one o1" them is operated by the master dou. it swings the universal bar 80 upward and swings the concentric part 82 rearward over the front ends `of all of the unoperated levers 72. with the result that all of said unoperated levers are positively locked in their normal positions. In usingr the Remington-llahl machine the operator writes the numbers in one or more columns. setting the machine for addition or subtraction. as required for each numbery yof certain Geneva wheels 7l which- As the carriage travels through a.

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liti

In this event not only will t'he wrong total have been writ-ten at the foot of that particular column` but the number standing in the machine will be added into'the next computation and will cause an erroneous total to be written at the foot of that column of figures, even if that total is correctly copied. It is therefore'highly important both that the total on the wheels be cor` rectly copied and that at the beginning of any ycomputation the totalizer shall be clear. I provide means Jfor lockingi up the. machine and thus eflj'ectually notifying the operator of the error in both cases, that isto say, if the totalizer is not clear when the computation is begun and it' it is not clear after the total has been copied.

My clca1ance-proof mechanism includes a device controlled by the state of the register as to clear or not clear. Each of the pinions 68 has one .tooth 83 shorter than the rest. and when the Wheel indicates zerov this short tooth v83 stands inthe position shown in Figs. 1 and 2. ln the present instance the register-state-controlled device is a. feeler combr84 "consisting ofa ser'iesot arms projecting from transverse body rock shaft which at its ends is prolecting intoA part or pivoted ontrunnions 85 holes in theside plates of the totalizer. This comb can swing `about said trunnions .and it is mountedin suc'h-A position that when all of the wheels stand at'zei'o the shortness of the teeth 83 Awill allow the comb to drop to tbe forward posit-ion shown inFigs. 1 and 2. but when any pinion 68 and number wheel stands in any other posi-` tion one of the longer teeth of said pinion will hold the comb i'nlthe rear position4 shown in Fig., 3. It any one ofthe totalizer Ywheels is not at zero that will suffice to preven'tthe comb from dropping to its forward position` 'c A sheet metal arm 86 ismounted Von the right-hand end of the feeler comb 84. `As hereshown an enlarged part of the trunnion 85 passes through this arm. and said arm is also fastcnedto one of the teeth ot thecoinb bya dowel pin 87. "A spring 88 connecting this arm `with a' stud 90 on the right-hand casing plate tends to draw the arm and the comb toward the front of the machine. The arm 86 occupies the position shown in Figs. 4 and 5y and between it yand the right-hand casing plate of the to'- `talizer 18 is a latch lever 91 pivoted at its It' the total has been incor-f rectly copied soine one or more of the wheels V will indicate .some other number than zero.

- the late-h lever 91 "5,3 lies in the notch between lower end on a stud 92 projecting from the casing plate, said lever being drawn toward the rear of t'he machine by a spring 9? 96 in the. arm 86, said notch being wider in a front and back direction than the diameter -v of the pin. The spring power tending to move the teeler comb forward, is able to over- V'coi'nethe tendency of spring 93 to move latch lever 91 rearward. Atits upper rear corner has two shoulders, namely. a lower shoulder 97 andv an upper shoulder 98, said shoulders adapted to be engaged by the forward end of a lever -100 pivoted on the transverse rod 74 and'A having a depending arm with a forward finger 101 and a rear finger 102. The lowershoulder 97 is merely a stop to4 limit lthe motion yof lever 100,;and said shoulder may7 it' preferred be. omitted anda fixed stop substituted. l lVhen the totalizer is in the sub-units position, that4 is to.sayin a position one letter space to the leftv of that in which t'he master wheel 38 engages the `units wheel. 40, the master dog the fingers 101 and 102, so that if at this time a numeral key be operated and said master dog be thereby swung forward. it will roekthe leverlOO as shown in Fig. 3. It atthat time all of thel numeral wheels stand at. zero, the comb 84 will-be held in its for ward position, shown in' Figs. 1 and 2, and the lever 91 will be prevented from moving rearward under the tension-ot its spring .9i-3. Whenthe key is operated therefore the lever 100 will swingupv on thedown stroke of the Fig. 3, one of the pini'ons68 is not in its l zero position, then the comb 8i will he heldin its rear position, and the spring 93 will draw the latch lever 91 rearward and the shoulder 98 of said latch lever will snap in, under the lever 100 and hold it in its operated position. The prong 102 of vsaid lever will prevent the master dog from returning `to its normal position. and this in turn will prevent the key troni returniinr to its normal position. and tlhe machine will be. locked up. thus warningr the operator that he has failedto copy the totalV correctly.

The devices already described can be used to test the state of the totalizer before writing the first. number of a calculation. lint not conveniently. In order to do that it would be necessary first to move the carriage carriageback totlie right to berlin the writing and registering .of the number. I have therefore provided at the lett-hand side ot the totalizer additional mechanism which llt) can be operated before writ inc` the first number and without the necessity ot pulling the carriage back as just described. The letthand end of the comb Sl has au arm 103 mounted thereon in the same manner as the arm S includingV the dowel pin 10-1. hand latch lever 105 is pivoted to the letthand casing;- plate at 100 and is drawn rearward b v a spring' 10T. and interlocked with the arm 103 by means oi' a pin 10S all in substantially the same manner as the corresponding parts already described. The .lever 91 has been broken away along; irregular lines in Fig. 3 in order to show this mechanism. lever 110. in all respects similar to the lever 100 and like it controlled by one ot' the springs T5. pivol'ed on the rod T1 in position to eo-operate with the latch lever 105. rl`he construction is such thatl il in that letter space position just preceding the one in which the master wheel engages the totalizer wheel ot highest order any key be struck that controls the universal bar of the calculator, this lever 110 will be rocked by the master dopl 53. lf the totaliZer is clear at the time the arm will return to normal position and the operator can go on with the computation, but if the totalizer is not clear then the lever 110 will be latchcd in its operatedL position and the machine will be locked up and the operator thereby notified or warned that the totaiizer is not clear.

(nce the mechanism has warned the operator that the totaliZer is not clear it has performed its function and l have provided means whereby the operator can unlock the machine in order to aroceed to make the necessary corrections. buch means can be variously constructed. As here shown, l have mounted on the two ends ot' the shat't 6T on which the gears are journaled, two arms 111, one ot them lying` just inside the latch lever 91, and the other just inside t-he latch arm 105, as shown in Fig'. t3. Each ot the arms 111 has a pin 112 projectingl therefrom imo position to engage the inclined rear edge ot the latch lever 01 or 10:3. One ot the arms 111 is prolonged toward the liront of the machine and passes through a vertical slot in the-front casing plate and is formed into a handle 113. by depressing' which the two pins 112 can be swung` upward and caused to torce the levers 91 and 105 toward the front ol' the machine. thus releasing whichever one of the levers and 110 has been caught up on one ot said latchlevers and allowinc' the mechanism to return to normal position and to unlock the machine. 'l`his forward motion ot' these arms permitted by the lost motion ot the pins 05 and 10S in the notches 9G in the arms S0 and 103.

l have provided means to hold the feeler eemb Sl outot' Contact with the pinions GS during' the time when said pinions are heing turned by the numeral keys. This is ik left;

a decided advantage in apparatus` of' this sort, as it prevents the rubbing ol the endsl ot said teeth over said comb. (ln one end ot the universal bar S0 l have mounted an arm 114. relative turning motion between which and the universal bar is prevented by `a dowel pin 115, this arm being' shown in the present instance on the right-hand end of the universal bar. The arm 86 has a finger 11G projecting into the path ot the arm 11st in .such wise that whenever the universal bar S0 is operated by the lifting; ot one ot the levers T2. the arm 111, acting on said linger. swings the arm 8G and the teeler comb 81 rearward outl ot contact with the pinions 68, and so maintains` them duringthe entire down stroke ot the key. and theret'ore duringthe entire time when any pinion is turning.

The testing ot the state or condition ot the totalizer can be done by any key that operates the universal bar ot the calculating mechanism. A, special key can be connected up for the purpose. it desired, but l prefer to use the ordinary Zero key ot the machine, which operates the universal bar but does not operate the ditterential shaft 32.

Various means can he provided to assure that the operator works this key before be- `grinningr a computation and also .immediately at'ter writing" a total. rl`he means here adopted consists in placing on the type bar 11, Fig: 7. that is connected with said zero key. an upper case character 11T which is here shown as a star. This star can be printed by first depressing the case shitt key 12 and then operating the zero key 10. lt is contemplated that a rule ot operation be enforced according; to which the operator must write this star before the first item of 'every computation and immediately atter every written total. rlfhe presence of this star on the paper in the two positions indicated. shows that the operator applied the test and that it there 'as any error he was apprised of that tact and presumably corrected it.

Various changes can be made in the details ot construction and arrangement without departingi from my invention.

lVhat I claim as new and desire to secure by Letters Patent, is,

1. In a calculating machine. the combination ot' a totalizer and an actuator, one traveling;r relatively to the other. a set ot `Hkeys, a register-state-controlled device in said totalizer` and two key operated devices one ateach side ot' the totalizer whose action is controlled by said registerstate-controlled device to indicate to the operator the 4state ot the register as to clear or not clear.

2. In a calculating machine, they combination ot' a .totalizer and an actuator, one travcling relatively to the other. a set ot keys, a register-state-controlled device in said totaliso `lies SIG #e le-elles one et each side of Sai; el' and been controlled by sind registe-centr0llecl device, andtwo Key 0pciten Y teelize" and an "actuating one f vreleively -to the other, aeet of regiei3e.i-fstateControlled` device in.

Azeig tive key epereted devices one ne eneli gifle of seid totelizei, e, lock "ce leek :ip the machine, and means whereby Said leek ie 'controlled by each of seid ley Operi'efl devices under the control of S21-id reg;

ieI.enst-etecenifelled device.v Y

ei. lin' ecalculeting machine, the Combinelicn of a totelizei' and an actuator, one traveling relatively to the other, a set of e xfegisteremite-controlled' device in salici tetelizei., zwe key controlled devices ene et eecli side el eeifl totelizei, and ineens coniolled by said register-smteeontrollecl device fer prevening a complete operation of ley controlled devices` and of the key Willen operates them in cese the register is nee clem",

5. In e calculating machine, the conbina- 4 tien e, totelizei' and in actuator one traveln ing eletively 'te the other, keys, a registei1- levers one eontl'cllecl by' eacli 'ef Seial f ee Se' es te indicate te the @pewter the e of lie letzili'zer as to clear or-net cleanv y:ing el iocli slififi lin e celenletingmaenineythe combine-f eee-een'z'ellecl device in 'ieczilizei "inveley opel-Leed leveie one it cneli Sicile olf Seial toelizei"j leteliee fer senil level-e Controlled by Seid iegiscei-eeliefconti'elled device, and zi eleasing device fel" seid letelies eon'ipiieextending Leeioes `l'ie totalln e czilculeting machine9 the combine tien Ol: 'efmlizje'i enel zin ectu v5 one traveliteleeivelv le ilie other, sei izei'zelizez'feen aning a seiiee iegieier ,vlieelsj enel a register-Seeeeentiollel Cleyiee' e Set of keys Y y A. D. lSfZl.y

' ARTHUR F. PUOLE lJVitn'eSsee CHARLES E. SMXTHQ EMMA liveEEi-iJv 

